17.9 Nicotine Withdrawal 17.10 Angioedema 17.11 Serious Skin Reactions 17.12 Patients with Cardiovascular Disease 17.13 Driving or Operating Machinery 17.14 Vivid, Unusual, or Strange Dreams 17.15 Pregnancy and Lactation *Sections or subsections omitted from the full prescribing information are not listed.
In a human laboratory abuse liability study, a single oral dose of 1 mg varenicline did not produce any significant positive or negative subjective responses in smokers.
Varenicline blocks the ability of nicotine to activate α4β2 receptors and thus to stimulate the central nervous mesolimbic dopamine system, believed to be the neuronal mechanism underlying reinforcement and reward experienced upon smoking.
There was no evidence of a carcinogenic effect in mice administered varenicline by oral gavage for 2 years at doses up to 20 mg/kg/day (47 times the maximum recommended human daily exposure based on AUC).
If you, your family, or caregiver notice agitation, hostility, depression or changes in behavior or thinking that are not typical for you, or you develop any of the following symptoms, stop taking CHANTIX and call your doctor right away: • thoughts about suicide or dying, or attempts to commit suicide • new or worse depression, anxiety, or panic attacks • feeling very agitated or restless • acting aggressive, being angry, or violent • acting on dangerous impulses • an extreme increase in activity and talking (mania)